Acrylic acid(AA)/sodium 2-acrylamide-2-methylpro panesulfonic acid(AMPS-Na)/diisocyanate-modified allyl cyclodextrin (MACD) copolymer

Abstract

The invention relates to acrylic acid(AA) / sodium 2-acrylamide-2-methylpro panesulfonic acid(AMPS-Na) / diisocyanate-modified allyl cyclodextrin (MACD) copolymer. The copolymer can effectively adsorb organic molecules in wastewater and has higher fluid loss effect. The technical scheme is that: the copolymer is prepared by polymerizing three monomers, namely acrylic acid (AA), sodium 2-acrylamide-2-methylpro panesulfonic acid (AMPS-Na) and diisocyanate-modified allyl cyclodextrin (MACD); and the copolymer comprises 0.7 molar percent of AA, 15 to 50 molar percent of AMPS-Na and 49.3 to 84.3 molarpercent of MACD. A preparation method comprises the following steps of: adding an aqueous solution of AA, a solution of AMPS-Na and a solution of MACD; adding disodium ethylene diamine tetraacetate, potassium peroxydisulfate and sodium hydrogensulfite; and uniformly stirring and mixing, and reacting at the temperature of between 30 and 70DEG C for 5 to 8 hours under the protection of nitrogen to obtain the AA / AMPS-Na / MACD copolymer. The copolymer has good decontamination effect when treating the organic molecules in the wastewater, has good fluid loss effect in drilling fluid and can resist temperature higher than 250DEG C.

Description

technical field

[0001] The invention relates to an AA / AMPS-Na / MACD copolymer. The copolymer of the invention is used in treating pollutants in waste water and in drilling fluids in the oil and gas industry according to changing the ratio of monomers in the preparation process. Background technique

[0002] In recent years, the pollution of organic compounds to water bodies has become increasingly serious, and water pollution has become a global problem, and the research on its pollution level and health effects has attracted more and more attention. The most difficult task at present is how to remove organic molecules from water that typically do not have a strong affinity for most compounds. In response to this problem, traditional techniques include filtration, precipitation, coagulation, chlorine disinfection and activated carbon. However, various treatment processes are not very effective for removing stubborn organic substances in wastewater, such as aromatic organic m...

Examples

Embodiment 1

[0011] Example 1 Preparation method of AA / AMPS-Na / MACD copolymer sewage treatment agent.

[0012] Add 150mL of the prepared MACD aqueous solution with a concentration of 0.01g / mL diisocyanate modified allyl cyclodextrin into a 250mL beaker, and then add 8.5mL with a concentration of 0.1g / mL acrylic acid AA aqueous solution and a concentration of 0.5g / mL Sodium 2-acrylamido-2-methylpropanesulfonate AMPS-Na aqueous solution 5Ml; then add 1mL potassium persulfate with a concentration of 0.3g / mL disodium ethylenediaminetetraacetic acid and a concentration of 0.5g / mL 1mL And the concentration is 1.0g / mL sodium bisulfite 0.5mL; stir well on a magnetic stirrer and mix well, then fill with nitrogen for 40min to deoxygenate, react at 60℃ for 6h to obtain the transparent colloidal product AA / AMPS-Na / MACD copolymer .

[0013] Measure the intrinsic viscosity of the AA / AMPS-Na / MACD copolymer according to the standard described in GB12005.1-89, and then measure the molecular weight of the copo...

Embodiment 2

[0014] Example 2 Decontamination effect of AA / AMPS-Na / MACD copolymer.

[0015] In order to evaluate the decontamination effect of the AA / AMPS-Na / MACD copolymer, an adsorption test was performed to prove it. Soak the obtained product in sewage containing organic molecules. The specific process is as follows: first prepare a mixed solution of deionized water and ethanol at a volume ratio of 90:10, and then add 10 ml of toluene and phenol mixed solution to the above mixed solution; The product AA / AMPS-Na / MACD prepared above is formulated into a copolymer aqueous solution of 10-100mg / L; finally the mixed solution prepared above is added to the polymer aqueous solution, after 24h, in a centrifuge at 5000r / min After separation for 10 minutes, the adsorption equilibrium concentration was measured by visible light spectrophotometer, which proved that the AA / AMPS-Na / MACD copolymer prepared by this invention has a good decontamination effect on wastewater containing organic solvents such ...

Embodiment 3

[0016] Example 3 The preparation method of AA / AMPS-Na / MACD copolymer fluid loss additive.

[0017] Add 100mL of the prepared MACD aqueous solution with a concentration of 0.01g / mL diisocyanate modified allyl cyclodextrin to a 250mL beaker, and then add 8.5mL with a concentration of 0.1g / mL acrylic acid AA aqueous solution and a concentration of 0.5g / mL 10mL of 2-acrylamido-2-methylpropanesulfonate sodium AMPS-Na aqueous solution; then add 1mL of disodium edetate with a concentration of 0.3g / mL and 1mL of potassium persulfate with a concentration of 0.5g / mL in sequence And the concentration is 1.0g / mL sodium bisulfite 0.5mL; stir well on a magnetic stirrer and mix evenly, then fill with nitrogen for 40min to remove oxygen, react at 35℃ for 5h to obtain the gel-like product AA / AMPS-Na / MACD copolymer .

[0018] Measure the intrinsic viscosity of the AA / AMPS-Na / MACD polymer according to the standard described in GB12005.1-89, and then measure the molecular weight of the polymer acco...

technical field

[0001] The invention relates to an AA / AMPS-Na / MACD copolymer. The copolymer of the invention is used in treating pollutants in waste water and in drilling fluids in the oil and gas industry according to changing the ratio of monomers in the preparation process. Background technique

[0002] In recent years, the pollution of organic compounds to water bodies has become increasingly serious, and water pollution has become a global problem, and the research on its pollution level and health effects has attracted more and more attention. The most difficult task at present is how to remove organic molecules from water that typically do not have a strong affinity for most compounds. In response to this problem, traditional techniques include filtration, precipitation, coagulation, chlorine disinfection and activated carbon. However, various treatment processes are not very effective for removing stubborn organic substances in wastewater, such as aromatic organic m...

Examples

Embodiment 1

[0011] Example 1 Preparation method of AA / AMPS-Na / MACD copolymer sewage treatment agent.

[0012] Add 150mL of the prepared MACD aqueous solution with a concentration of 0.01g / mL diisocyanate modified allyl cyclodextrin into a 250mL beaker, and then add 8.5mL with a concentration of 0.1g / mL acrylic acid AA aqueous solution and a concentration of 0.5g / mL Sodium 2-acrylamido-2-methylpropanesulfonate AMPS-Na aqueous solution 5Ml; then add 1mL potassium persulfate with a concentration of 0.3g / mL disodium ethylenediaminetetraacetic acid and a concentration of 0.5g / mL 1mL And the concentration is 1.0g / mL sodium bisulfite 0.5mL; stir well on a magnetic stirrer and mix well, then fill with nitrogen for 40min to deoxygenate, react at 60℃ for 6h to obtain the transparent colloidal product AA / AMPS-Na / MACD copolymer .

[0013] Measure the intrinsic viscosity of the AA / AMPS-Na / MACD copolymer according to the standard described in GB12005.1-89, and then measure the molecular weight of the copo...

Embodiment 2

[0014] Example 2 Decontamination effect of AA / AMPS-Na / MACD copolymer.

[0015] In order to evaluate the decontamination effect of the AA / AMPS-Na / MACD copolymer, an adsorption test was performed to prove it. Soak the obtained product in sewage containing organic molecules. The specific process is as follows: first prepare a mixed solution of deionized water and ethanol at a volume ratio of 90:10, and then add 10 ml of toluene and phenol mixed solution to the above mixed solution; The product AA / AMPS-Na / MACD prepared above is formulated into a copolymer aqueous solution of 10-100mg / L; finally the mixed solution prepared above is added to the polymer aqueous solution, after 24h, in a centrifuge at 5000r / min After separation for 10 minutes, the adsorption equilibrium concentration was measured by visible light spectrophotometer, which proved that the AA / AMPS-Na / MACD copolymer prepared by this invention has a good decontamination effect on wastewater containing organic solvents such ...

Embodiment 3

[0016] Example 3 The preparation method of AA / AMPS-Na / MACD copolymer fluid loss additive.

[0017] Add 100mL of the prepared MACD aqueous solution with a concentration of 0.01g / mL diisocyanate modified allyl cyclodextrin to a 250mL beaker, and then add 8.5mL with a concentration of 0.1g / mL acrylic acid AA aqueous solution and a concentration of 0.5g / mL 10mL of 2-acrylamido-2-methylpropanesulfonate sodium AMPS-Na aqueous solution; then add 1mL of disodium edetate with a concentration of 0.3g / mL and 1mL of potassium persulfate with a concentration of 0.5g / mL in sequence And the concentration is 1.0g / mL sodium bisulfite 0.5mL; stir well on a magnetic stirrer and mix evenly, then fill with nitrogen for 40min to remove oxygen, react at 35℃ for 5h to obtain the gel-like product AA / AMPS-Na / MACD copolymer .

[0018] Measure the intrinsic viscosity of the AA / AMPS-Na / MACD polymer according to the standard described in GB12005.1-89, and then measure the molecular weight of the polymer acco...

Images